US5080041A - Pre-curved milk tube - Google Patents
Pre-curved milk tube Download PDFInfo
- Publication number
- US5080041A US5080041A US07/575,063 US57506390A US5080041A US 5080041 A US5080041 A US 5080041A US 57506390 A US57506390 A US 57506390A US 5080041 A US5080041 A US 5080041A
- Authority
- US
- United States
- Prior art keywords
- tube
- curved
- claw
- teat cup
- claw inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J7/00—Accessories for milking machines or devices
- A01J7/005—Automatic vacuum shutoff at the end of milking
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J5/00—Milking machines or devices
- A01J5/04—Milking machines or devices with pneumatic manipulation of teats
- A01J5/041—Milk claw
Definitions
- the invention relates to milking apparatus, and more particularly to an improved milk tube connected between a milking claw and a teat cup.
- Milking apparatus known in the prior art includes a plurality of teat cups connected to the cow, a milking claw having a plurality of inlets and having a discharge outlet through which the milk is suctioned, and a plurality of flexible milk tubes each connected between a respective teat cup and claw inlet.
- the milk tube is straight before connection to the claw inlet and the teat cup, and upon such connection curves outwardly and upwardly from the claw inlet to the teat cup which is mounted on the cow's teat.
- the present invention involves recognition of a source of unnecessary flow restriction in the milk tube.
- the milk tube Upon connection between the claw inlet and the teat cup, the milk tube is stressed to curve outwardly and upwardly from the claw inlet to the teat cup. It has been found that the noted stressing of the milk tube tends to deform the tube toward the claw inlet opening to reduce the inner cross sectional area of the tube and decrease the inner clearance between the tube and the claw inlet opening, which restricts flow. It has also been found that in the non-milking position with the teat cup hanging downwardly, the tube does not provide as good a shut-off seal against the claw inlet as desired.
- the present invention provides simple structure recognizing the cause of the above noted problems and effectively solving same.
- the present invention provides a pre-curved milk tube which is not stressed in the milking position and instead retains its full circular size in the inlet area, which provides less restriction to flow.
- the pre-curved milk tube In the non-milking position with the teat cup hanging downwardly, the pre-curved milk tube has to rotate through a greater range from its unstressed upwardly curved position to the downward non-milking position, which provides a better shut-off seal than a straight tube.
- FIG. 1 is a perspective view of a milking claw known in the prior art.
- FIG. 2 is a side view of a milking claw and milk tube known in the prior art.
- FIG. 3 is a side view of milking apparatus known in the prior art.
- FIG. 4 is an enlarged sectional view of a portion of the structure in FIGS. 2 and 3.
- FIG. 5 is a side view of milking apparatus in a non-milking position as known in the prior art.
- FIG. 6 is an enlarged view of a portion of the structure in FIG. 5.
- FIG. 7 is a view like FIG. 2 and shows the present invention.
- FIG. 8 is a view like FIG. 3 and shows the present invention.
- FIG. 9 is a view like FIG. 4 and shows the present invention.
- FIG. 10 is a view like FIG. 5 and shows the present invention.
- FIG. 11 is a view like FIG. 6 and shows the present invention.
- FIG. 12 is a sectional view taken along line 12--12 of FIG. 11.
- FIG. 13 is a side elevation view of a precurved milk tube in accordance with the invention.
- FIG. 14 is a sectional view of the structure of FIG. 13.
- FIGS. 1-3 show milking apparatus known in the prior art, including a teat cup 20 for connection to a cow 22, a milking claw 24 having a plurality of inlets 26, 28, 30, 32, and attachment or hanging hooks 34, 36, and having a discharge outlet 38 for connection to a source of suction (not shown), and a flexible milk tube 40 connected between a respective teat cup 20 and a respective claw inlet 26, all as known in the art, for example U.S. Pat. Nos. 2,518,589, 3,150,637, 4,253,419, 4,324,201, 4,537,152, 4,745,881, 4,756,275, 4,869,205, incorporated herein by reference.
- Milk tube 40 is a resilient flexible member, typically rubber, which is straight before connection between claw inlet 26 and teat cup 20, and upon such connection curves outwardly and upwardly from claw inlet 26 to teat cup 20. It has been found that this connection stresses tube 40 and that such stress tends to deform the tube at portion 42, FIG. 4, against the claw inlet and downwardly toward upwardly facing beveled claw inlet opening 44 to reduce the inner cross sectional area of tube 40 and decrease the clearance 46 between inner surface 47 of tube 40 and claw inlet 26 at beveled opening 44, and thus restrict milk and air flow.
- FIG. 3 shows the milking position of the apparatus with teat cup 20 above claw inlet 26.
- FIG. 5 shows the non-milking position with teat cup 20 below claw inlet 26, and with tube 40 bent downwardly, opposite to the upward curving of FIG. 3, and shutting off claw inlet 26 to prevent flow therethrough. It has been found that the shut-off at beveled opening 44 is not always complete, and that there may remain a small gap as shown at 48 in FIG. 6.
- FIGS. 7-14 show the present invention and use like reference numerals from FIGS. 1-6 where appropriate to facilitate understanding.
- a flexible milk tube 50 is connected between teat cup 20 and claw inlet 26.
- Tube 50 is a formed pre-curved resilient member, preferably rubber, having an unstressed position extending outwardly from claw inlet 26 and curved upwardly to teat cup 20.
- Tube 50 also curves upwardly when non-connected to the teat cup, FIG. 13, such that tube 50 normally and naturally extends outwardly and upwardly from claw inlet 26.
- the pre-curvature and natural upward curving of tube 50 minimize stress in the tube when connected between claw inlet 26 and teat cup 20, in contrast to the stress created in straight tube 40 upon such connection.
- the stress in tube 40 tends to deform the tube at portion 42 adjacent claw inlet 26 to reduce the inner cross sectional area of the tube and restrict flow.
- Pre-curved tube 50 maintains increased clearance, as shown at 52, FIG. 9, between the inner surface 54 of tube 50 and beveled claw inlet opening 44. As seen by comparing FIGS. 9 and 4, clearance 52 is greater than clearance 46. The increased clearance 52 maximizes the inner cross sectional area of tube 50 and provides less restriction to flow.
- Pre-curved tube 50 has a humped outer configuration 56, FIG. 13 and 14, providing increased sidewall thickness 58 of tube 50 adjacent claw inlet 26 to further resist deformation of the tube which would otherwise restrict flow.
- Humped outer configuration 56 includes a circumferential shoulder portion 60 extending radially outwardly to an extended outer diameter 61, and a tapered portion 62 tapered along the tube and of decreasing outer diameter as tapered portion 62 tapers away from shoulder portion 60.
- Shoulder portion 60 is axially spaced from claw inlet 26, and tapered portion 62 overlaps claw inlet 26 at opening 44.
- Tube 50 has one end portion 64 of an outer diameter 65 prior to connection, which diameter increases when connected to claw inlet 26, as the rubber material of the tube stretches to fit around the claw inlet.
- Tapered portion 62 tapers away from end portion 64, and shoulder portion 60 has the noted extended outer diameter 61 greater than the noted pre-connected outer diameter 65 of end portion 64.
- Tube 50 has another end portion 66 distally opposite end portion 64 and having outer diameter 65 prior to connection to teat cup 20, which diameter increases when connected to teat cup 20, as the rubber material of the tube stretches to fit around the teat cup.
- End portion 66 has an inner wall 68, FIG. 14, of reduced diameter to better fit the teat cup.
- Tube 50 has a central portion 70 between shoulder portion 60 and end portion 66 and of a constant outer diameter 65 equal to the outer diameter of end portions 64 and 66 prior to the noted connection.
- Shoulder portion 60 is substantially closer to end portion 64 then to end portion 66.
- the combined length of central portion 70 and end portion 66 is substantially longer than the combined length of end portion 64, tapered portion 62 and shoulder portion 60.
- the milking apparatus has a milking position as shown in FIG. 8 with teat cup 20 above claw inlet 26.
- the milking apparatus has a non-milking position as shown in FIG. 10 with teat cup 20 below claw inlet 26 and with tube 50 bent downwardly by gravity, opposite to the upward curving of FIG. 8, and shutting off claw inlet 26 at beveled inlet opening 44 to prevent flow therethrough, FIG. 11.
- the rotation of pre-curved tube 50 from its unstressed position to the downward non-milking position provides a greater range of motion than a straight tube, which greater range of motion creates more deformation of the tube in the downward shut-off position, effecting a better shut-off seal.
- the inner surface 72, FIG. 11, of tube 50 is bent downwardly over and engages outer tip 74 of beveled inlet opening 44 to provide the seal.
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- Life Sciences & Earth Sciences (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- External Artificial Organs (AREA)
Abstract
Description
Claims (17)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/575,063 US5080041A (en) | 1990-08-30 | 1990-08-30 | Pre-curved milk tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/575,063 US5080041A (en) | 1990-08-30 | 1990-08-30 | Pre-curved milk tube |
Publications (1)
Publication Number | Publication Date |
---|---|
US5080041A true US5080041A (en) | 1992-01-14 |
Family
ID=24298782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/575,063 Expired - Lifetime US5080041A (en) | 1990-08-30 | 1990-08-30 | Pre-curved milk tube |
Country Status (1)
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US (1) | US5080041A (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0784924A1 (en) | 1996-01-16 | 1997-07-23 | Dec International, Inc. | Milk meter |
USD384445S (en) * | 1996-03-18 | 1997-09-30 | Alfa Laval Agri, Inc. | Milking claw |
USD418951S (en) * | 1998-05-19 | 2000-01-11 | Alfa Laval Agri Ab | Asymmetric teat cup claw |
WO2000076298A1 (en) * | 1999-06-10 | 2000-12-21 | Delaval Holding Ab | A hose device |
US6298807B1 (en) | 1999-04-08 | 2001-10-09 | Delaval, Inc. | Top unloading tapered barrel claw |
US6401655B1 (en) | 2000-04-13 | 2002-06-11 | Delaval Inc. | Milking claw with concave window |
US6543382B1 (en) | 2002-02-08 | 2003-04-08 | Delaval, Inc. | Side outlet milking claw |
WO2005018308A1 (en) * | 2003-08-26 | 2005-03-03 | Delaval Holding Ab | A tubular hose device |
US20050229858A1 (en) * | 2004-04-20 | 2005-10-20 | Steingraber Gary C | Milking claw top |
US6981468B1 (en) | 2004-04-20 | 2006-01-03 | Bou-Matic Technologies Corp. | Milking claw bottom |
US20060005772A1 (en) * | 2004-06-29 | 2006-01-12 | Jin-Woong Shin | Milking liner |
DE102007022801A1 (en) * | 2007-05-11 | 2008-11-13 | Westfaliasurge Gmbh | Milking unit for milking e.g. cow, has pair of milk tubes flexibly connected with milk collecting piece, where flexible connection is lockable, and has two degrees of freedom |
US20080289579A1 (en) * | 2007-05-11 | 2008-11-27 | Markus Auburger | Milking of an animal with reduced teat stress |
US20090050062A1 (en) * | 2007-05-11 | 2009-02-26 | Markus Auburger | Milking unit for milking an animal |
DE102007054725A1 (en) | 2007-11-14 | 2009-05-20 | Westfaliasurge Gmbh | Milking hose, for a milking machine, has a ball-shaped clamping body at one end with an opening offset from the hose longitudinal axis to reduce teat stress |
US20100126422A1 (en) * | 2007-05-11 | 2010-05-27 | Markus Auburger | Milking of animals with reduced teat stress |
US20110036297A1 (en) * | 2009-08-11 | 2011-02-17 | Charles Jeffrey Laney | Teat cup shell |
US20110132265A1 (en) * | 2009-12-08 | 2011-06-09 | Charles Jeffrey Laney | Vent for milking liner |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2518589A (en) * | 1947-06-13 | 1950-08-15 | Austin E Anderson | Milking machine |
US3150637A (en) * | 1963-01-29 | 1964-09-29 | Kenneth E Fosnes | Milking machine milker |
US3611993A (en) * | 1969-11-10 | 1971-10-12 | Laval Separator Co De | Valving arrangement for operating teat cup liners |
US4196696A (en) * | 1977-02-22 | 1980-04-08 | Alfa-Laval Ab | Shock absorber for teat cup liner |
GB2053648A (en) * | 1979-07-20 | 1981-02-11 | Woodville Polymer Eng | Milking machine |
US4253419A (en) * | 1979-05-24 | 1981-03-03 | The De Laval Separator Company | Milk claw |
US4324201A (en) * | 1980-11-13 | 1982-04-13 | Hi-Life Rubber, Inc. | Milking inflation |
US4537152A (en) * | 1984-06-01 | 1985-08-27 | Dec International, Inc. | Milking claw |
US4745881A (en) * | 1986-09-08 | 1988-05-24 | Larson Reed A | Milking inflation |
US4756275A (en) * | 1985-10-31 | 1988-07-12 | Larson Leigh R | Milking inflation |
US4869205A (en) * | 1988-06-03 | 1989-09-26 | Hi-Life Rubber Inc. | Milking machine inflation |
-
1990
- 1990-08-30 US US07/575,063 patent/US5080041A/en not_active Expired - Lifetime
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2518589A (en) * | 1947-06-13 | 1950-08-15 | Austin E Anderson | Milking machine |
US3150637A (en) * | 1963-01-29 | 1964-09-29 | Kenneth E Fosnes | Milking machine milker |
US3611993A (en) * | 1969-11-10 | 1971-10-12 | Laval Separator Co De | Valving arrangement for operating teat cup liners |
US4196696A (en) * | 1977-02-22 | 1980-04-08 | Alfa-Laval Ab | Shock absorber for teat cup liner |
US4253419A (en) * | 1979-05-24 | 1981-03-03 | The De Laval Separator Company | Milk claw |
GB2053648A (en) * | 1979-07-20 | 1981-02-11 | Woodville Polymer Eng | Milking machine |
US4324201A (en) * | 1980-11-13 | 1982-04-13 | Hi-Life Rubber, Inc. | Milking inflation |
US4537152A (en) * | 1984-06-01 | 1985-08-27 | Dec International, Inc. | Milking claw |
US4756275A (en) * | 1985-10-31 | 1988-07-12 | Larson Leigh R | Milking inflation |
US4745881A (en) * | 1986-09-08 | 1988-05-24 | Larson Reed A | Milking inflation |
US4869205A (en) * | 1988-06-03 | 1989-09-26 | Hi-Life Rubber Inc. | Milking machine inflation |
Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5720236A (en) * | 1996-01-16 | 1998-02-24 | Dec International, Inc. | Milk meter |
EP0784924A1 (en) | 1996-01-16 | 1997-07-23 | Dec International, Inc. | Milk meter |
USD384445S (en) * | 1996-03-18 | 1997-09-30 | Alfa Laval Agri, Inc. | Milking claw |
USD418951S (en) * | 1998-05-19 | 2000-01-11 | Alfa Laval Agri Ab | Asymmetric teat cup claw |
US6298807B1 (en) | 1999-04-08 | 2001-10-09 | Delaval, Inc. | Top unloading tapered barrel claw |
US7121590B1 (en) | 1999-06-10 | 2006-10-17 | Delaval Holding Ab | Hose device |
WO2000076298A1 (en) * | 1999-06-10 | 2000-12-21 | Delaval Holding Ab | A hose device |
AU758456B2 (en) * | 1999-06-10 | 2003-03-20 | Delaval Holding Ab | A hose device |
US6401655B1 (en) | 2000-04-13 | 2002-06-11 | Delaval Inc. | Milking claw with concave window |
US6543382B1 (en) | 2002-02-08 | 2003-04-08 | Delaval, Inc. | Side outlet milking claw |
WO2003065794A2 (en) * | 2002-02-08 | 2003-08-14 | Delaval, Inc. | Side outlet milking claw |
WO2003065794A3 (en) * | 2002-02-08 | 2004-03-11 | Delaval Inc | Side outlet milking claw |
US20070000549A1 (en) * | 2003-08-26 | 2007-01-04 | Nils Alveby | Tubular hose device |
WO2005018308A1 (en) * | 2003-08-26 | 2005-03-03 | Delaval Holding Ab | A tubular hose device |
EP1588608A1 (en) * | 2004-04-20 | 2005-10-26 | Bou-Matic Technologies Corporation | Milking claw |
US6981468B1 (en) | 2004-04-20 | 2006-01-03 | Bou-Matic Technologies Corp. | Milking claw bottom |
US7021239B2 (en) | 2004-04-20 | 2006-04-04 | Bou-Matic Technologies Corp. | Milking claw top |
US20050229858A1 (en) * | 2004-04-20 | 2005-10-20 | Steingraber Gary C | Milking claw top |
AU2005200358B2 (en) * | 2004-04-20 | 2007-09-06 | Bou-Matic Technologies Corporation | Milking claw top |
US20060005772A1 (en) * | 2004-06-29 | 2006-01-12 | Jin-Woong Shin | Milking liner |
US7578260B2 (en) | 2004-06-29 | 2009-08-25 | Lauren Agrisystems, Ltd. | Milking liner |
US20080289579A1 (en) * | 2007-05-11 | 2008-11-27 | Markus Auburger | Milking of an animal with reduced teat stress |
US20090050062A1 (en) * | 2007-05-11 | 2009-02-26 | Markus Auburger | Milking unit for milking an animal |
US8671886B2 (en) | 2007-05-11 | 2014-03-18 | Gea Farm Technologies Gmbh | Milking of animals with reduced teat stress |
DE102007022801A1 (en) * | 2007-05-11 | 2008-11-13 | Westfaliasurge Gmbh | Milking unit for milking e.g. cow, has pair of milk tubes flexibly connected with milk collecting piece, where flexible connection is lockable, and has two degrees of freedom |
US20100126422A1 (en) * | 2007-05-11 | 2010-05-27 | Markus Auburger | Milking of animals with reduced teat stress |
US9801351B2 (en) | 2007-05-11 | 2017-10-31 | Gea Farm Technologies Gmbh | Milking of animals with reduced teat stress |
US9253960B2 (en) | 2007-05-11 | 2016-02-09 | Gea Farm Technologies Gmbh | Milking unit for milking an animal |
US9060493B2 (en) | 2007-05-11 | 2015-06-23 | GEA Farm Technologies, GmbH | Milking unit for milking an animal |
US8833300B2 (en) | 2007-05-11 | 2014-09-16 | Gea Farm Technologies Gmbh | Milking of an animal with reduced teat stress |
DE202008018453U1 (en) | 2007-05-11 | 2014-02-11 | Gea Westfaliasurge Gmbh | Milking animals under reduced teat load |
DE102007054725A1 (en) | 2007-11-14 | 2009-05-20 | Westfaliasurge Gmbh | Milking hose, for a milking machine, has a ball-shaped clamping body at one end with an opening offset from the hose longitudinal axis to reduce teat stress |
US8302561B2 (en) | 2009-08-11 | 2012-11-06 | Lauren Agrisystems, Ltd. | Teat cup shell |
US20110036297A1 (en) * | 2009-08-11 | 2011-02-17 | Charles Jeffrey Laney | Teat cup shell |
US8056505B2 (en) | 2009-12-08 | 2011-11-15 | Lauren Agrisystems, Ltd. | Vent for milking liner |
US20110132265A1 (en) * | 2009-12-08 | 2011-06-09 | Charles Jeffrey Laney | Vent for milking liner |
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